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5 Reasons to Hire Professional Insulation Contractors in Toronto

September 29, 2017

When a home is not energy efficient, it’s wasting energy and wasting money. On the other hand, when a home is well insulated and energy efficient, energy consumption is reduced, and annual utility costs (for heating and cooling) are decreased. Homeowners shopping for a professional insulation contractor in Toronto can benefit from a number of energy upgrades. Best of all, the results are measurable: energy efficiency is enhanced throughout the home; heating and cooling costs are dramatically reduced; and home comfort is improved from bedrooms to basement.

1.  Expert inspection and assessment of the home

professional insulation contractors torontoBefore even insulating, it’s wise to assess a home’s energy efficiency by identifying weaknesses in the building envelope. This can be done with a “blower door test”, which pinpoints deficiencies, particularly with respect to energy efficiency. The test also identifies remedies and retrofits that would improve the situation. With a good insulation contractor in Toronto, cost-effective “fixes” can be recommended - everything from weatherizing, to air sealing, to insulation, to ventilation.

2.  Determining the need for insulation removal

Attic or basement, it’s important to determine whether existing insulation requires removal. Here, hiring a professional insulation contractor in Toronto can be valuable, mainly for the expert assessment of existing conditions. In fact, there are cases where existing insulation might only need “topping up” and sealing air leaks may be the only “fix” required. Where insulation is damaged or deteriorated, removal may be necessary – work that should be left to professionals.

3.  Various insulation products to choose from

For optimal energy efficiency, a space should be effectively sealed, well insulated, and properly ventilated. With a professional insulation contractor in Toronto, homeowners are assured of a job that is done right from end to end. Professionals can recommend the best insulation product for the job, and the most effective installation approach. This might include spray foam insulation or blown in insulation, but whatever the product, air sealing and air ventilation must be considered.

4.  Insulating exterior walls for better comfort

Where recommended, exterior walls can be insulated to increase R-Value and dramatically boost energy efficiency. Well-insulated walls prevent heat from escaping in winter, and prevent cool air from escaping in summer. And with a professional insulation contractor in Toronto, there are some innovative approaches (drill-and-fill) that are very effective, and with excellent outcomes. Using blown in insulation, the wall cavities are thermally insulated in a cost-effective installation.

5.  Insulating basements for energy efficiency

Basements require airflow control and moisture control to ensure the best energy efficiency. This is where spray foam insulation can be most effective. The entire space is sealed tight; moisture is prevented from collecting; and higher-than-average R-Values are assured. With a well-insulated basement, energy efficiency affects the entire home, with improved indoor comfort, reduced utility costs (for heating and cooling), and cost savings that can offset the original investment.

To learn more about home insulation, call the insulation professionals at Great Northern Insulation (1-800-265-1914) or visit the company website at www.gni.ca .

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Muskoka, Haliburton, Northern Ontario

1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

TOLL FREE: 1-800-265-1914

Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

TOLL FREE: 1-800-265-1914

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

Homestars Best of 2021 Award

Best of 2021

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

Homestars Best of 2022 Award

Best of 2022

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

Trusted for Over 40 Years

Over 40 Years in Business

At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project.

100% Canadian

100% Canadian

Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.

Foam Masters

Do it right the first time
- with foam mastersTM

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


3MTM products.
Quality + Performance = Savings

3MTM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).

Holmes and Holmes

Holmes and Holmes


Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.


Enbridge Incentives

The Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.


We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

As Seen on Love It or List It

The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

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